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codeql-action/node_modules/es-abstract/2023/RegExpHasFlag.js
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'use strict'; | |
var GetIntrinsic = require('get-intrinsic'); | |
var callBound = require('call-bind/callBound'); | |
var $TypeError = GetIntrinsic('%TypeError%'); | |
var $RegExpPrototype = GetIntrinsic('%RegExp.prototype%'); | |
var SameValue = require('./SameValue'); | |
var Type = require('./Type'); | |
var $indexOf = callBound('String.prototype.indexOf'); | |
var hasRegExpMatcher = require('is-regex'); | |
var getFlags = require('regexp.prototype.flags'); | |
// https://262.ecma-international.org/13.0/#sec-regexphasflag | |
module.exports = function RegExpHasFlag(R, codeUnit) { | |
if (Type(codeUnit) !== 'String' || codeUnit.length !== 1) { | |
throw new $TypeError('Assertion failed: `string` must be a code unit - a String of length 1'); | |
} | |
if (Type(R) !== 'Object') { | |
throw new $TypeError('Assertion failed: Type(R) is not Object'); | |
} | |
if (!hasRegExpMatcher(R)) { // step 2 | |
if (SameValue(R, $RegExpPrototype)) { | |
return void undefined; // step 2.a | |
} | |
throw new $TypeError('`R` must be a RegExp object'); // step 2.b | |
} | |
var flags = getFlags(R); // step 3 | |
return $indexOf(flags, codeUnit) > -1; // steps 4-5 | |
}; |